Look for Chiif, http://www.chiifcameras.com
the owner of wallyourphoto is a very friendly chap.. have a nice chat with him while I was there buying canson paper.Try also www.wallyourphotos.com also Pic & pixel at Funan, which I use.
can try Botak,
http://www.botaksign.com.sg/, they are not a print lab but do all sorts of printing for indoor and outdoor advertising. You can even email them your file for printing an collect them when it is ready (usually the next day) cheap and good (just printed 2 pcs of 25 X 36 inch for less that $20/-)but please note that they will not do any color correction for you.
curious --- printed on what material?
these are for roadshow, exhibition, events and advertisements stuffs, it will won't last very long, that the type that TS is looking for.
curious --- printed on what material?